Android Learning Notes
Last Update:2016-11-28
Source: Internet
Author: User
<span id="Label3"></p><p><p><strong>14 Main Components</strong> : activity,service,broadcastreceiver,contentprovider,intent</p></p><p><p>Intent message body function: the transfer of data from one interface to another interface needs to use</p></p><p><p><strong>2 Layout Manager:</strong></p></p><p><p>Linear Layout: Android.widget.LinearLayout<br>Absolute Layout: Android.widget.AbsoluteLayout<br>Table Layout: Android.widget.TableLayout<br>Frame Layout: Android.widget.FrameLayout<br>Relative Layout: Android.widget.RelativeLayout</p></p><p><p>View subclass, ViewGroup can act as a container for other controls</p></p><p><p><strong>3.Java of four internal classes:</strong></p></p><p><p>http://blog.csdn.net/qq435757399/article/details/7037007</p></p><p><p><strong>4.java class Name. This</strong></p></p><p><p>This refers to the object that is currently accessing this code, when using this in an inner class is the object of the inner class,<br>In order to access the outer class object, you can use the outer class Name. this to access, and generally only in this case use this</p></p><pre><span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">class</span></span>Activity01<span style="color: #0000ff;"><span style="color: #0000ff;">extends</span></span><span style="color: #000000;"><span style="color: #000000;">activity{</span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">void</span></span><span style="color: #000000;"><span style="color: #000000;">onCreate (Bundle Savedinstancestate) {</span></span><span style="color: #0000ff;"><span style="color: #0000ff;">Super</span></span><span style="color: #000000;"><span style="color: #000000;">. OnCreate (savedinstancestate); </span></span><span style="color: #008000;"><span style="color: #008000;">/*</span></span><span style="color: #008000;"><span style="color: #008000;">Setting the display main.xml layout</span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span><span style="color: #000000;"><span style="color: #000000;">Setcontentview (r.layout.main); </span></span><span style="color: #008000;"><span style="color: #008000;">/*</span></span><span style="color: #008000;"><span style="color: #008000;">Findviewbyid (r.id.button1) Get button1 in Layout main.xml</span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span><span style="color: #000000;"><span style="color: #000000;">button Button</span></span>=<span style="color: #000000;"><span style="color: #000000;">(Button) Findviewbyid (r.id.button1); </span></span><span style="color: #008000;"><span style="color: #008000;">/*</span></span><span style="color: #008000;"><span style="color: #008000;">Monitor event information for a button</span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span><span style="color: #000000;"><span style="color: #000000;">Button.setonclicklistener (</span></span><span style="color: #0000ff;"><span style="color: #0000ff;">New</span></span><span style="color: #000000;"><span style="color: #000000;">Button.onclicklistener () {</span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> public</span> <span style="color: #0000ff;"><span style="color: #0000ff;">void</span></span><span style="color: #000000;"><span style="color: #000000;">OnClick (View V) {</span></span><span style="color: #008000;"><span style="color: #008000;">/*</span></span><span style="color: #008000;"><span style="color: #008000;">Create a new intent object</span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span><span style="color: #000000;"><span style="color: #000000;">Intent Intent</span></span>=<span style="color: #0000ff;"><span style="color: #0000ff;">New</span></span><span style="color: #000000;"><span style="color: #000000;">Intent (); </span></span><span style="color: #008000;"><span style="color: #008000;">/*</span></span><span style="color: #008000;"><span style="color: #008000;">specifies the class to start intent</span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span><span style="color: #000000;"><span style="color: #000000;">Intent.setclass (Activity01.</span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> this</span>, Activity02.<span style="color: #0000ff;"><span style="color: #0000ff;">class</span></span><span style="color: #000000;"><span style="color: #000000;">); </span></span><span style="color: #008000;"><span style="color: #008000;">/*</span></span><span style="color: #008000;"><span style="color: #008000;">start a new activity</span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span><span style="color: #000000;"><span style="color: #000000;">startactivity (intent); </span></span><span style="color: #008000;"><span style="color: #008000;">/*</span></span><span style="color: #008000;"><span style="color: #008000;">Close the current activity</span></span><span style="color: #008000;"><span style="color: #008000;">*/</span></span><span style="color: #000000;"><span style="color: #000000;">Activity01.</span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> this</span><span style="color: #000000;"><span style="color: #000000;">. Finish (); } }); }}</span></span></pre><p><p></p></p><p><p>Android Learning Notes</p></p></span>
